ArtimusBena,
If this type of sophistry led you away from your Christian upbringing maybe you should reconsider a few things. You had a lengthy post so maybe we can deal with the issues one or two at a time.
You said "If God's truth were as perfect and unquestionable as you say, he wouldn't need a bible to make his existence, or his teachings, known to us. They would simply be obvious to everyone."
You forget one tenet of your Christian upbringing- sin. Sin defiles our mind and conscience and darkens our foolish heart.
Let me ask you briefly why it is that people get math problems wrong, disagree on scientific laws, kill each other in war, lie etc.? Or consider this, logic is something that everyone must presuppose in order to think. Why is it that logicians and philosophers disagree on what logic is, and which are laws of logic?

By the way the old "could god make a rock so heavy even he couldn't carry it' bit" is not a valid question as it presupposes God within time and space like a man. Or to 'change the glory of the uncorruptible God into an image made like unto corruptible man'(Rom.1)